<template>
	<view>
		<view class="cart-container" v-if="cart.length !== 0">

			<!-- 收货地址组件 -->
			<my-address></my-address>

			<!-- 购物车商品列表的标题区域 -->
			<view class="cart-title">
				<!-- 左侧的图标 -->
				<uni-icons type="shop" size="18"></uni-icons>
				<!-- 描述文本 -->
				<text class="cart-title-text">购物车</text>
			</view>

			<!-- 商品列表区域 -->
			<uni-swipe-action>
				<block v-for="(goods, i) in cart" :key="i">
					<uni-swipe-action-item :right-options="options" @click="swipeActionClickHandler(goods)"
						@change="swipeChange">
						<my-goods :goods="goods" :showRadio="true" @radio-change="radioChangeHandler" :showNum="true"
							@num-change="numberChangeHandler"></my-goods>
					</uni-swipe-action-item>
				</block>
			</uni-swipe-action>

			<!-- 使用自定义的结算组件 -->
			<my-settle></my-settle>
		</view>

		<view class="empty-cart" v-else>
			<image src="/static/cart_empty@2x.png" class="empty-img"></image>
			<text class="tip-text">空空如也~</text>
		</view>
	</view>
</template>
<script>
	import {
		mapState,
		mapActions
	} from 'vuex'

	import badgeMix from '../../mixins/tabbar-badge.js'

	export default {
		mixins: [badgeMix],

		computed: {
			...mapState('m_cart', ['cart'])
		},

		data() {
			return {
				options: [{
					text: '删除',
					style: {
						backgroundColor: '#C00000'
					}
				}]
			};
		},

		methods: {
			...mapActions('m_cart', ['updateGoodsState', 'updateGoodsCount', 'removeGoodsById']),

			// 商品的勾选状态发生了变化
			radioChangeHandler(e) {
				// 修改 store 中的 cart 的选中状态
				this.updateGoodsState(e)
			},

			// 商品的数量发生了变化
			numberChangeHandler(e) {
				this.updateGoodsCount(e)
			},

			// 删除购物车中的商品
			swipeActionClickHandler(goods) {
				this.removeGoodsById(goods.goods_id)
			},

			swipeChange(e, index) {

			}
		}
	}
</script>

<style lang="scss">
	.cart-container {
		padding-bottom: 50px;
	}

	.cart-title {
		height: 40px;
		display: flex;
		align-items: center;
		padding-left: 5px;
		border-bottom: 1px solid #efefef;

		.cart-title-text {
			font-size: 14px;
			margin-left: 10px;
		}
	}

	.empty-cart {
		display: flex;
		flex-direction: column;
		align-items: center;
		padding-top: 150px;

		.empty-img {
			width: 90px;
			height: 90px;
		}

		.tip-text {
			font-size: 12px;
			color: gray;
			margin-top: 15px;
		}
	}
</style>
